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Modeling study of thermal excursion of chemical reactions of beryllium/beryllide pebbles with steam and its implication to fusion DEMO safety
https://repo.qst.go.jp/records/66463
https://repo.qst.go.jp/records/66463dc89f37c-f00e-4e4a-b48c-08c7da34511b
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-10-02 | |||||
| タイトル | ||||||
| タイトル | Modeling study of thermal excursion of chemical reactions of beryllium/beryllide pebbles with steam and its implication to fusion DEMO safety | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_c94f | |||||
| 資源タイプ | conference object | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
中村, 誠
× 中村, 誠× 金, 宰煥× 中道, 勝× 染谷, 洋二× 飛田, 健次× 坂本, 宜照× 日渡, 良爾× 中村 誠× 金 宰煥× 中道 勝× 染谷 洋二× 飛田 健次× 坂本 宜照× 日渡 良爾 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Water-cooled pebble-bed (WCPB) blanket, in which beryllium/beryllide in a pebble form is used, is one of blanket concepts based on present or near-term technology for fusion reactor. However, combination use of water, as coolant, and beryllium/beryllide, as neutron multiplier, may pose a critical safety problem, i.e. the chemical reactivity of the beryllium/beryllide pebble and the hazard of the reaction-produced hydrogen. We present a new phenomenological model of the reaction behaviors of the beryllium and beryllide Be12Ti pebbles with the steam. The model consists of the equations of the transients of (i) the radius of the un-reacted part and (ii) the temperature of the pebble. We have developed a code PSYCHE to numerically solve the model equations. It has been found that the amount of the reaction-produced hydrogen obtained by the code simulation agree well with the experimental observations. We also show an application of the code to safety analysis of the thermal excursion of the Be and Be12Ti pebbles in an in-box LOCA, i.e. loss-of-coolant accident in an blanket box. The analysis indicates that use of the Be12Ti pebbles can avoid the risk of the thermal excursion. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 13th International Workshop on Beryllium Technology (BeWS-13) | |||||
| 発表年月日 | ||||||
| 日付 | 2017-09-22 | |||||
| 日付タイプ | Issued | |||||
